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US11009112B2 - Bicycle front sprocket - Google Patents

Bicycle front sprocket Download PDF

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Publication number
US11009112B2
US11009112B2 US15/485,009 US201715485009A US11009112B2 US 11009112 B2 US11009112 B2 US 11009112B2 US 201715485009 A US201715485009 A US 201715485009A US 11009112 B2 US11009112 B2 US 11009112B2
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United States
Prior art keywords
assembly
center
front sprocket
drive ring
bicycle front
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Active, expires
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US15/485,009
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US20170292598A1 (en
Inventor
Robert Erik Moore
Douglas Alexander CHALMERS
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Fox Factory Inc
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Fox Factory Inc
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Publication date
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Priority to US15/485,009 priority Critical patent/US11009112B2/en
Publication of US20170292598A1 publication Critical patent/US20170292598A1/en
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT PATENT SECURITY AGREEMENT Assignors: FOX FACTORY, INC.
Priority to US16/440,286 priority patent/US12060928B2/en
Assigned to FOX FACTORY, INC. reassignment FOX FACTORY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOORE, ROBERT ERIK, CHALMERS, DOUGLAS ALEXANDER
Priority to US17/319,542 priority patent/US11788615B2/en
Application granted granted Critical
Publication of US11009112B2 publication Critical patent/US11009112B2/en
Assigned to WELLS FARGO BANK, NATIONAL ASSOCIATION reassignment WELLS FARGO BANK, NATIONAL ASSOCIATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FOX FACTORY, INC.
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D25/00—Special casting characterised by the nature of the product
    • B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B1/00—Producing shaped prefabricated articles from the material
    • B28B1/24—Producing shaped prefabricated articles from the material by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/105—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like involving front sprocket chain-wheels engaged by the chain, belt or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels

Definitions

  • Embodiments of the invention generally relate to a front sprocket assembly for a chain driven vehicle.
  • Traditional bicycle front sprocket structures are often made from metals, such as aluminum. Moreover, it is presently a subtractive process to make them. For example, the metal is machined, punched out, stamped, and the like.
  • the traditional bicycle front sprocket is also a relatively flat-structure.
  • the current front sprocket is like a plate or disc, e.g., a 2-dimensional structure, which results in it having low lateral stiffness.
  • a bicycle such as a mountain bike that has a large number of gears in the rear
  • the angle of the chain changes as the different rear gears are selected.
  • As the chain moves to the peripheral gears on the rear there can be an increasing component of lateral pull on the front sprocket which can deleteriously affect the traditional front sprocket, resulting in a loss of drive efficiency and potential for mechanical issues.
  • FIG. 1 is an exploded view of a crack assembly, in accordance with an embodiment.
  • FIG. 2 is a diagram of a bicycle front sprocket assembly, in accordance with an embodiment.
  • FIG. 3 is a transparent diagram of the bicycle front sprocket assembly, in accordance with an embodiment.
  • FIGS. 4A, 4B and 4C are different views of the crank drive ring, in accordance with an embodiment.
  • FIGS. 5A, 5B and 5C are different views of the composite bicycle front sprocket assembly, in accordance with an embodiment.
  • FIGS. 6A, 6B, 6C, 6D, 6E and 6F are different views of the outer assembly, in accordance with an embodiment.
  • FIG. 7 is a flowchart of a method for manufacturing the bicycle front sprocket assembly, in accordance with an embodiment.
  • FIG. 8 is a flowchart of a method for manufacturing the bicycle front sprocket assembly that includes a crank drive ring, in accordance with an embodiment.
  • front sprocket assembly achieves a more integrated aesthetic with composite crank arms. Additionally, embodiments create a front sprocket assembly which is lighter than all-aluminum front sprocket. Further the bicycle front sprocket assembly is able to achieve the above accomplishments while still meeting or exceeding conventional strength and stiffness criteria for front sprockets. Also, the disclosed front sprocket assembly can be built with a lower cost than is found in many conventional front sprockets. The lower costs include a material savings provided by a process that reduces material waste when compared to a traditional manufacturing process.
  • FIG. 1 is an exploded view of a crank assembly 10 , in accordance with an embodiment.
  • crank assembly 10 is shown in conjunction with bicycle frame and bottom bracket portion 11 where it is mounted.
  • Crank assembly 10 includes a left hand non drive crank assembly 34 which includes a left hand crank arm 15 b and a spindle 12 .
  • Crank assembly 10 also includes a right hand drive side crank assembly 36 which includes a right hand drive side crank arm 15 a and a front sprocket assembly 100 .
  • spindle 12 includes a spindle interface 13 .
  • right hand drive side crank arm 15 a has an assembly interface 17 that will couple with front sprocket assembly 100 .
  • Front sprocket assembly interface 17 will couple with opening 109 of front sprocket assembly 100 (as shown in FIG. 2 ) to fixedly couple front sprocket assembly 100 with right hand drive side crank arm 15 a thereby forming the right hand drive side crank assembly 36 .
  • a lock ring is used to fixedly couple the front sprocket assembly 100 onto right hand drive side crank arm 15 a.
  • crank assembly 10 includes additional parts such as, pedals, pedal washers, preloader, dust caps, spindle spacers, bearings, hex nuts, preload adjusters, and the like. Those parts are not shown for purposes of clarity.
  • Front sprocket assembly 100 includes an outer assembly 102 having a plurality of teeth 104 about an outer perimeter.
  • outer assembly 102 has 32 teeth. Although 32 teeth are shown in one embodiment, the technology is well suited to the use of various other numbers of teeth 104 such as 28 , 30 , 34 , or the like.
  • outer assembly 102 is comprised of a first material.
  • the first material is a metallic component, e.g., aluminum, titanium, steel, or the like.
  • Front sprocket assembly 100 further includes a center assembly 106 .
  • center assembly 106 is comprised of a different material than that of outer assembly 102 .
  • center assembly 106 is formed by injection molding of carbon fiber reinforced nylon.
  • center assembly 106 is formed via compression molding.
  • center assembly 106 is formed via composite layering.
  • the material for center assembly 106 is nylon reinforced with carbon fibers.
  • the material for injection molded center assembly 106 is chopped carbon fibers.
  • center assembly 106 may be a plastic, polymer, other long fiber-reinforced plastics, or the like.
  • center assembly 106 is formed with an optional crank arm fitting area 112 .
  • crank arm fitting area 112 is an indentation formed in center assembly 106 within which right hand drive side crank arm 15 a will fit.
  • Center assembly 106 has an opening 109 in the center thereof. Opening 109 is provided for coupling front sprocket assembly 100 with right hand drive side crank arm 15 a via front sprocket assembly interface 17 . Opening 109 further allows the insertion of spindle 12 there through such that spindle interface 13 can be coupled with right hand drive side crank assembly 36 .
  • the first material forming outer assembly 102 is selected to have a modulus of elasticity which is higher than the modulus of elasticity of the second material which forms center assembly 106 .
  • the first material is aluminum, titanium, steel, or another metal; and the second material is a composite material such as, for example, carbon fiber reinforced plastic material, plastic, polymer, fiberglass, or the like.
  • front sprocket assembly 100 includes optional crank drive ring 108 .
  • crank drive ring 108 is coupled to center assembly 106 such that crank drive ring 108 is disposed approximately about a center of outer assembly 102 surrounding opening 109 .
  • crank drive ring 108 is used to transfer the load during high pressure situations, and to stop brinelling that may occur in the composite material of center assembly 106 along the spline interface and marring about opening 109 .
  • the crank drive ring 108 is made of the same material as outer assembly 102 .
  • the crank drive ring 108 is made of a different material such as titanium, steel, or other metal or composite.
  • crank drive ring 108 is ceramic.
  • a ceramic co-mold may be used to mold a ceramic crank drive ring 108 within the injection mold process.
  • FIG. 3 a transparent diagram of front sprocket assembly 100 is shown in accordance with an embodiment.
  • tabs 110 are formed during the formation of outer assembly 102 and are inwardly projecting from outer assembly 102 .
  • center assembly 106 is coupled to outer assembly 102 utilizing tabs 110 of outer assembly 102 such that center assembly 106 is formed about tabs 110 of outer assembly 102 .
  • tabs 110 are tapered such that they are narrower at the base of outer assembly 102 and wider at the furthest point from outer assembly 102 . As such, the center assembly 106 will lock about the tabs 110 of outer assembly 102 and resist having outer assembly 102 from being pulled out of the center assembly 106 .
  • one or more tabs 110 will include an optional hole 187 .
  • optional hole 187 is at least one opening through tabs 110 that are utilized during the molding process to provide additional security in the contact between outer assembly 102 and center assembly 106 .
  • the final front sprocket assembly will have additional contact areas and interlocking aspects to further keep center assembly 106 properly oriented and fixedly and irremovably coupled with outer assembly 102 .
  • the components will be irremovably coupled without any need for an external fastening device such as, but are not limited to: screws, bolts, clips, rivets, and the like.
  • center assembly 106 may have any number of spokes and that outer assembly 102 may have any number of tabs 110 .
  • composite center assembly 106 is irremovably coupled with two or more of the plurality of tabs 110 on the inner perimeter of outer assembly 102 .
  • the number of spokes for center assembly 106 and tabs 110 of outer assembly 102 may not always be the same.
  • outer assembly 102 could have 6 tabs 110 and center assembly would only have four spokes and thus only utilize four of the tabs 110 .
  • the spokes of center assembly 106 will overlap with the tabs 110 of outer assembly 102 but will not connect with each other.
  • knit lines can be avoided during the injection molding process.
  • center assembly 106 may be manufactured via composite layering or the like which would allow center assembly 106 to have a continuous perimeter about outer assembly 102 without the concern of knit line formation.
  • FIG. 4A is a front view 400
  • FIG. 4B is a side view 425
  • FIG. 4C is a isometric view 450 .
  • crank drive ring 108 includes a geometry that corresponds to the shape of front sprocket assembly interface 17 .
  • the outer diameter of crank drive ring 108 has an array of block features 401 that are surrounded by partial holes 415 which are slightly over-center to create a tapered shape on the block features 401 that acts similar to a shrink fit for locking the crank drive ring 108 into the composite center assembly 106 .
  • crank drive ring 108 is made from aluminum (or other metal).
  • center assembly 106 is molded about the tapered shaped block features 401 of crank drive ring 108 (and similarly the tapered shaped block features of tabs 110 of outer assembly 102 ).
  • the carbon fiber and aluminum are molded together at temperate, there is a difference between the thermal expansion of aluminum (or other metal making up crank drive ring 108 ) versus the thermal expansion of carbon fiber (or other material making up center assembly 106 ). Since the aluminum (or other metal) has a higher thermal expansion, during the cooling process the aluminum contracts more than the carbon fiber.
  • the block features 401 that are surrounded by partial holes 415 will shrink more than the carbon fiber center assembly which will further fixedly and irremovably couple the aluminum crank drive ring 108 with the carbon fiber center assembly 106 without an external fastening device being needed.
  • an external fastening device include, but are not limited to: screws, bolts, clips, rivets, and the like.
  • FIG. 5A is a front view 500
  • FIG. 5B is a side view 525
  • FIG. 5C is a cross sectional view 550
  • FIG. 5A front view 500 is similar to that of FIG. 2 and is utilized to illustrate the cross section FIG. 5B and a possible diameter of opening 109 .
  • FIG. 5B side view 525 is provided to illustrate the different topography 512 that is available to front sprocket assembly 100 .
  • the topography 512 of front sprocket assembly 100 is not flat, but is of different thicknesses.
  • the different thickness increases the lateral stiffness of front sprocket assembly 100 as compared to a pressed or flat front sprocket assembly design.
  • FIG. 5C cross sectional view 550 provides a look at the different components of front sprocket assembly 100 as they are formed into an irremovably coupled front sprocket assembly 100 .
  • FIGS. 6A, 6B, 6C, 6D, 6E, and 6E are different views of outer assembly 102 is shown in accordance with an embodiment.
  • the views include FIG. 6A front view 600 , FIG. 6B front view 605 , FIG. 6C side view 625 , FIGS. 6D and 6E sectional views 650 , and FIG. 6F detail drawing 675 .
  • FIG. 6A front view 600 shows the taper aspects of the plurality of tabs 110 as they grow wider from the inner perimeter of outer assembly 102 toward the center thereof. That is, FIG. 6A front view 600 illustrates the tapered shape of tab 110 to include a narrower length at a first portion (e.g., the base of tab 110 ) connected with the inner perimeter of outer assembly 102 and a wider length at a second portion (e.g., the tip of tab 110 ) furthest from the inner perimeter of outer assembly 102 .
  • a first portion e.g., the base of tab 110
  • a second portion e.g., the tip of tab 110
  • FIG. 6B front view 605 illustrates a number of weight saving holes 612 that are within outer assembly 102 .
  • FIG. 6C side view 625 illustrates the flatness and the thickness, of one embodiment, of outer assembly 102 .
  • FIGS. 6D and 6E section views 650 also illustrate a number of design differences about outer assembly 102 which may be used for weight savings, structural rigidity, and the like.
  • FIG. 6F detail drawing 675 illustrates one embodiment of the possible geometry, including height, width, chain well, and the like, for the teeth 104 of outer assembly 102 .
  • FIG. 7 a flowchart 700 of a method for manufacturing the front sprocket assembly 100 is shown in accordance with an embodiment.
  • one embodiment receives an outer assembly 102 comprised of a first material.
  • the first material is aluminum.
  • the first material may be another metal such as, titanium, steel, nickel, or the like.
  • center assembly 106 forms a composite center assembly 106 about an inner portion of the outer assembly 102 .
  • center assembly 106 is formed by injection molding of carbon fiber reinforced nylon.
  • center assembly 106 is formed via compression molding.
  • center assembly 106 is formed via composite layering.
  • the composite center is comprised of a second material.
  • the material for center assembly 106 is a chopped carbon fiber reinforced with nylon.
  • the material for injection molded center assembly 106 is chopped carbon fibers.
  • center assembly 106 may be a plastic, polymer, or the like. Although a number of specific measurements are referred to, in one embodiment, the length of the chopped carbon fibers may be longer or shorter than 7 mm.
  • the composite center assembly 106 is disposed at least partially within the outer assembly 102 .
  • the composite center is irremovably coupled with the outer assembly without using an external fastening device.
  • center assembly 106 may be manufactured via composite layering or the like which would allow center assembly 106 to be irremovably coupled with and have a continuous perimeter about outer assembly 102 without the concern of knit line formation.
  • center assembly 106 includes a plurality of tabs 110 on the inner perimeter and center assembly 106 is irremovably coupled to outer assembly 102 utilizing tabs 110 of outer assembly 102 such that center assembly 106 is formed about tabs 110 of outer assembly 102 , e.g., via injection molding, pressure molding, or the like.
  • tabs 110 are tapered such that they are narrower at the base of outer assembly 102 and wider at the furthest point from outer assembly 102 . As such, the center assembly 106 will lock about the tabs 110 of outer assembly 102 and resist having outer assembly 102 from being pulled out of the center assembly 106 .
  • FIG. 8 a flowchart 800 of a method for manufacturing the front sprocket assembly 100 that includes crank drive ring 108 is shown in accordance with an embodiment.
  • the portions of flowchart 800 are utilized in addition to those previously described in flowchart 700 such that an additional component, crank drive ring 108 , is also irremovably coupled into the composite front sprocket assembly 100 during the formation thereof.
  • crank drive ring 108 receives the optional crank drive ring 108 .
  • the inner diameter of crank drive ring 108 includes a geometry that corresponds to the shape of front sprocket assembly interface 17 .
  • the outer diameter of crank drive ring 108 has an array of block features 401 that are surrounded by partial holes 415 which are slightly over-center
  • crank drive ring 108 is used to transfer the load during high pressure situations, and to stop brinelling that may occur in the composite material of center assembly 106 along the spline interface and marring about opening 109 .
  • the crank drive ring 108 is made of the same material as outer assembly 102 .
  • the crank drive ring 108 is made of a different material such as titanium, steel, or other metal or composite.
  • crank drive ring 108 is ceramic.
  • a ceramic co-mold may be used to mold a ceramic crank drive ring 108 within the injection mold process that forms composite front sprocket assembly 100 .
  • one embodiment orients the crank drive ring 108 within a perimeter of the outer assembly 102 such that the crank drive ring 108 is disposed about an approximate center of the outer assembly 102 .
  • center assembly 106 forms the composite center assembly 106 about the inner portion of the outer assembly 102 and an outer portion of the crank drive ring 108 .
  • center assembly 106 is formed by injection molding of carbon fiber reinforced nylon.
  • center assembly 106 is formed via compression molding.
  • center assembly 106 is formed via composite layering.
  • the composite center assembly 106 is disposed at least partially about an external perimeter of the crank drive ring 108 .
  • the composite center is irremovably coupled with the crank drive ring without using an external fastening device.
  • the outer diameter of crank drive ring 108 has an array of block features 401 that are surrounded by partial holes 415 which are slightly over-center to create a tapered shape on the block features 401 that acts similar to a shrink fit for locking the crank drive ring 108 into the composite center assembly 106 .
  • embodiment of the front sprocket assembly 100 described herein achieve a more integrated aesthetic with carbon crank arms. Additionally, embodiments create a front sprocket assembly 100 which is lighter than all-aluminum front sprockets.
  • the target weight of front sprocket assembly is 60 grams.
  • the front sprocket assembly 100 is able to achieve the above accomplishments while still meeting or exceeding conventional strength and stiffness criteria for front sprockets. E.g., the fatigue life requirements dictated by JIS D 9415-1993, part 4 (5); EN 14766:2005: E, part 4.13.7.X; and ISO 4210-8:2014, Part 4.4.1.
  • the front sprocket assembly 100 can be built with a lower cost than is found in many conventional front sprockets.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Gears, Cams (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
US15/485,009 2016-04-11 2017-04-11 Bicycle front sprocket Active 2038-01-10 US11009112B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/485,009 US11009112B2 (en) 2016-04-11 2017-04-11 Bicycle front sprocket
US16/440,286 US12060928B2 (en) 2016-04-11 2019-06-13 Bicycle front sprocket
US17/319,542 US11788615B2 (en) 2016-04-11 2021-05-13 Bicycle front sprocket

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662321138P 2016-04-11 2016-04-11
US15/485,009 US11009112B2 (en) 2016-04-11 2017-04-11 Bicycle front sprocket

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US16/440,286 Division US12060928B2 (en) 2016-04-11 2019-06-13 Bicycle front sprocket
US17/319,542 Continuation US11788615B2 (en) 2016-04-11 2021-05-13 Bicycle front sprocket

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US20170292598A1 US20170292598A1 (en) 2017-10-12
US11009112B2 true US11009112B2 (en) 2021-05-18

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US15/485,009 Active 2038-01-10 US11009112B2 (en) 2016-04-11 2017-04-11 Bicycle front sprocket
US16/440,286 Active 2037-06-27 US12060928B2 (en) 2016-04-11 2019-06-13 Bicycle front sprocket
US17/319,542 Active US11788615B2 (en) 2016-04-11 2021-05-13 Bicycle front sprocket

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US16/440,286 Active 2037-06-27 US12060928B2 (en) 2016-04-11 2019-06-13 Bicycle front sprocket
US17/319,542 Active US11788615B2 (en) 2016-04-11 2021-05-13 Bicycle front sprocket

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US (3) US11009112B2 (zh)
EP (1) EP3239035A1 (zh)
CN (2) CN107380340B (zh)
CA (1) CA2964058A1 (zh)
TW (1) TWI731062B (zh)

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USD938864S1 (en) * 2021-04-01 2021-12-21 Yuantao Tong Bracket for bicycle
US11333235B2 (en) * 2019-06-14 2022-05-17 NHI Mechanical Motion, LLC Hybrid drive component
US12140216B1 (en) * 2022-05-16 2024-11-12 NHI Mechanical Motion, LLC Hybrid drive component

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TWI731062B (zh) 2016-04-11 2021-06-21 美商福克斯製造有限公司 自行車前鏈輪
US10093389B2 (en) * 2016-11-16 2018-10-09 Shimano Inc. Bicycle front sprocket, bicycle crank assembly, and bicycle drive train
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US10550925B2 (en) * 2017-06-02 2020-02-04 Shimano Inc. Bicycle sprocket
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Cited By (3)

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US11333235B2 (en) * 2019-06-14 2022-05-17 NHI Mechanical Motion, LLC Hybrid drive component
USD938864S1 (en) * 2021-04-01 2021-12-21 Yuantao Tong Bracket for bicycle
US12140216B1 (en) * 2022-05-16 2024-11-12 NHI Mechanical Motion, LLC Hybrid drive component

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US20170292598A1 (en) 2017-10-12
US20190293165A1 (en) 2019-09-26
CN107380340A (zh) 2017-11-24
US20210262559A1 (en) 2021-08-26
EP3239035A1 (en) 2017-11-01
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US12060928B2 (en) 2024-08-13
CA2964058A1 (en) 2017-10-11

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